Philips-MCD-755-Service-Manual(1) 电路图 维修手册.pdf

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1、Version 1.0 MCD755 3141 785 32120 DVD Micro theatre all versions Published by LX 0737 Service Audio Subject to modification Copyright 2007 Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or

2、transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Service Aids .1-1 Info. about lead-free soldering.1-1 Service Instruction .1-1 CD Playability Check .2-1.2-3 Disassembly digram .3-1.3-5 Software version check and up

3、grading .4-1 Block diagram .5-1 Wiring diagram .6-1 Tuner Board circuit diagram .7-1 layout diagram .7-2 VFD Board circuit diagram .8-1 layout diagram .8-2 CPU Board circuit diagram. .9-1 layout diagram .9-2.9-3 AMP Board circuit diagram .10-1 layout diagram .10-2.10-3 Exploded view diagram .11-1 Se

4、rvice partslist .12-1.12-2 Commercial partslist TABLE OF CONTENTS RadioFans.CN 收音机爱 好者资料库 1-1 Service Tools: Universal Torx driver holder .4822 395 91019 Torx bit T10 150mm .4822 395 50456 Torx driver set T6-T20 .4822 395 50145 Torx driver T10 extended .4822 395 50423 Compact Disc: SBC426/426A Test

5、disc 5 + 5A .4822 397 30096 SBC442 Audio Burn-in test disc 1kHz .4822 397 30155 SBC429 Audio Signals disc .4822 397 30184 Dolby Pro-logic Test Disc .4822 395 10216 SERVICE AIDS GBWARNING All ICs and many other semi-conductors are susceptible to electrostatic discharges (ESD). Careless handling durin

6、g repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wrist wrap with resistance. Keep components and tools also at this potential. ESD CLASS 1 LASER PRODUCT GB Safety regulations require that the set be restored t

7、o its original condition and that parts which are identical with those specified, be used Safety components are marked by the symbol !. Lead free RadioFans.CN 收音机爱 好者资料库 Set remains closed! Standard repair procedure N Y Play a CD for at least 10 minutes Y playability ok ? N playability ok ? add Info

8、 for customer SET OK playability ok ? Y N check playability N Y playability ok ? check playability check playability EYE-Pattern ok ? N Y check EYE-Pattern replace CD Drive Laser current ok ? N Y check Laser current CD Drive offsets ok ? NY check CD Drive offsets clean the lens check playability ret

9、urn set Customer complaint CD related problem return set return set replace CD Drive return set replace CD Drive return set replace Signal Processor return set fast lens cleaning 1 2 3 4 5 6 7 For flap loaders (= access to CD drive possible) cleaning method 4 is recommended 1 - 7 For description - s

10、ee following pages CD PLAYABILITY CHECK 2 -1 RadioFans.CN 收音机爱 好者资料库 1 PLAYABILITY CHECK For sets which are compatible with CD-RW discs use CD-RW Printed Audio Disc.7104 099 96611 TR 3 (Fingerprint) TR 8 (600 Black dot) maximum at 01:00 playback of these two tracks without audible disturbance playin

11、g time for: Fingerprint 10seconds Black dot from 00:50 to 01:10 jump forward/backward (search) within a reasonable time For all other sets use CD-DA SBC 444A.4822 397 30245 TR 14 (600 Black dot) maximum at 01:15 TR 19 (Fingerprint) TR 10 (1000 wedge) playback of all these tracks without audible dist

12、urbance playing time for: 1000 wedge 10seconds Fingerprint 10seconds Black dot from 01:05 to 01:25 jump forward/backward (search) within a reasonable time 2 CUSTOMER INFORMATION It is proposed to add an addendum sheet to the set which informs the customer that the set has been checked carefully - bu

13、t no fault was found. The problem was obviously caused by a scratched, dirty or copy-protected CD. In case problems remain, the customer is requested to contact the workshop directly. The lens cleaning (method 3) should be mentioned in the addendum sheet. The final wording in national language as we

14、ll as the printing is under responsibility of the Regional Service Organizations. 3 FAST LENS CLEANING (dry brush) Use lens cleaning CD SBC AC300.9082 100 00043 Insert the lens cleaning CD, press PLAY and follow the voice guides instructions on the CD. 4 LIQUID LENS CLEANING Because the material of

15、the lens is synthetic and coated with a special anti-reflectivity layer, cleaning must be done with a non-aggressive cleaning fluid. It is advised to use “Cleaning Solvent B4-No2”, available with codenumber 4822 389 10026. The actuator is a very precise mechanical component and may not be damaged in

16、 order to guarantee its full function. Clean the lens gently (dont press too hard) with a soft and clean cotton bud moistened with the special lens cleaner. The direction of cleaning must be in the way as indicated in the picture below. Before touching the lens it is advised to clean the surface of

17、the lens by blowing clean air over it. This to avoid that little particles make scratches on the lens. CD PLAYABILITY CHECK 2-2 5 EYE-PATTERN SIGNAL JITTER MEASUREMENT Measure the signal on the input of the Signal processor using an analog oscilloscope. Please find the exact measuring point in your

18、Service Manual. See below examples of the signal. Amplitude should read at least 700mVpp using SBC444A. good bad If the oscilloscope shows a signal like the bad one, and/or the amplitude decreases within 1 minute - the CD drive has to be replaced. 6 CD DRIVE LASER CURRENT MEASUREMENT The laser curre

19、nt can be measured as a voltage drop on a resistor. The resistor is marked in every Service Manual. The value depends on the type of CD drive. typical valuemost probably defect VAMxxxx: 150-230mV350mV MCDxx: 170-230mV300mV DA1x: 210-250mV350mV DA2x: 175-200mV250mV Use SBC444A (CD-DA) for measurement

20、. 7 CD DRIVE OFFSET MEASUREMENT The photodiodes of the CD-drive may have an offset. These offsets have to be compensated by the signal processor. High offsets can lead to poor playability of some CDs (skipping tracks). To measure the offset values, start the Service Test Program - section “Focus Tes

21、t” without a CD. The offsets can be measured with a DC Millivoltmeter directly on the connector (see drawing below). Pin numbering varies from drive to drive. The values from diode A-D should read 010mV. Diodes E and F are less critical. If one of the offsets is higher than 10mV the CD drive has to

22、be replaced. Otherwise replace the Signal Processor. Sanyo DA12T3 CD Drive A A F C B E C D E VCC B VREF F D 9 10 11 12 13 14 15 16 1800 +5V_HF VrefCD10 A D E B C F GND8 E D A B C F Laser power control 100n 2878 470n 2876 3821 1R 1K 3823 2880 33p +5V BC807-40 7879 3817 47R 3820 4R7 47R 3819 1n 2879 2

23、877 47u 1 8 4 7811-A LM358D 3 2 10K 3822 47R 3818 2841 100n 47n 2869 +5V_HF LASER DIODE U 250mV -Laser damaged ! 4,6V 3V 3,3V 3,9V 2V 0,17V 0,17V Sanyo DA12T3 HF-Amplifier D3 D2 D1 Drive detection 680R 3905 3903 3K3 BC847B 7877 47n 2818 1K5 3902 5 7 4 2 1 6 3 64 8 9 10 11 470R 3893 +3.3V 2K2 3908 10

24、K 3923 BC847B 7878 BC847B 7876 4n7 2813 3896 100R 220u 2885 2881 560p 47n 2887 560R 3901 2883 470n 2817 4u7 3n3 2814 3898 220R 3895 27K 470n 2884 +3.3V 3909 820R 3907 100R 3920 33K 3897 2882 82p 3K3 3904 2K7 3899 3906 470R +5V_HF HFIN VrefCD10 100p 28152816 22n LDON to 3826,3827 VREF GE VDDA1 VRIN V

25、SSA1 ISLICE LDON D1 D2 D3 D4 HFIN HFREF IREF CD_DA: 0V / CD_RW: 3V (A-D) 800mVpp TB = 0.5s/div EYE-PATTERN 1,8V 1,2V 2,4V 2,6V 0,65V CD PLAYABILITY CHECK 2-3 MCD755 Disassembly-DVD layer A. Remove bottom cover B.Remove top cover and loosen screws 310PTH(4PCS), 38FT(2PCS) A1.Loosen screws 2.57PWMTT(3

26、PCS),2.65PWMTT(7PCS) B1. Loosen screws 310FA（1PCS） C. Remove side plate and loosen screws 36BTH(4PCS),36FMTT(2PCS) C1. Loosen screws where is the back of side plank 34FMTT(4PCS) Remove bezal panel and loosen screws 35FMTT(2PCS) A B B1 C C1 Disassembly diagram Page:62 D.Loosen screws 310PWA(2PCS),38P

27、WMTT(2PCS)and then remove mechanism core E.Loosen screws 310FA(7PCS),36FMTT(1PC),and remove rear plate F. Remove motor and loosen screws where is the front of side plate 36FT(2PCS), 310BT（2PCS） G.Loosen screws 36PM(6PCS), remove CPU card and decode card D E F G Disassembly diagram Page:63 H. Loosen

28、screws 26PWT(2PCS), remove slide plate J.Loosen screws J1 2.68PT(7PCS) J2 2.65PT(4PCS) J3 2.66PT(2PCS), and remove top cover I. Loosen screws2.68PT(8PCS), and remove VFD board H I J2 J1 J3 Disassembly diagram Page:64 MCD755 Disassembly-AMP layer A.Looen screws2.65PWMTT(8PCS), remove plastic bottom c

29、over B. Loosen screws 310PTH(6PCS) 36BTH(4PCS), remove side plank and top cover C. Loosen screws36FMTT(5PCS), remove bezal plank D.Loosen screws 312FA(4PCS), 310FT(1PC), 35FMTT(4PCS), remove rear plank A B C D Disassembly diagram Page:65 E. Loosen screws 35BM(3PCS), remove connection card F. Loosen

30、screws 35BM(4PCS), remove AMP board G. Loosen screws 35BM(4PCS), remove power board E F G Disassembly diagram Page:66 H. Loosen screws 2.68PT(6PCS), 2.65PT(2PCS), remove bezal panel I. Loosen screws and remove top cover H I2 I1 I1. 2.68PT (7PCS) I2. 2.65PT（4PCS） I3. 2.66PT （2PCS） I3 Disassembly diag

31、ram Page:67 4 - 14 - 1 SOFTWARE VERSION CHECK AND UPGRADING SET BLOCK DIAGRAM 5 - 15 - 1 TDA8922 TDA8920 TDA8922 PT2322 9228 24C02 PT2323 TUNER BLOCK IC:TEA5760 AUX2 AUX2 IN AUX1 AUX1 IN RED R OUT VIDEO V-OUT S-VIDEO S-V OUT COAXIAL OPTICAL GREEN GR OUT BLUE B OUT MEPG2 BLOCK MECHANISM DVD STBY&MUTE

32、 CONTROL VFD PT16311 REM 1 GND 2 Vcc 3 REM-SENSOR CPU5V CPU5V CPU5V +Vs -Vs DVD 12V ACSWITCH POWER STANDBY +12V +Vs -Vs CPU5V DVD 12V DVD ON/OFF TUNER POWER TUNER IN AUX2 IN AUX1 IN DVD MR DVD ML D-FL D-FR SL SR CEN SW SW CEN SL SR FL FR FL FR SW CEN SL SR CPU SDA SCL FR FL SL SR CEN SW KEY CONTROL

33、FR SR CEN SW SL FL STANDBY MUTE SUR-MUTE MUTE SUR-MUTE GND 6 - 1 6 - 1 SET WIRING DIAGRAM VCC A6 RFIN1 B6 FREQIN C1 RFIN2 C6 RFGND C5 LOOPSW A2 CPOUT A1 LO1 A3 LO2 A4 VccVCO A5 SWPORT B1 BUSEN C2 VREFDIG E3 CLOCK E2 DATA E1 DGND D3 VDD D1 DGND D2 INTX B2 TMUTE D6 VAFR E6 VAFL E5 MPXOUT E4 AGND B5 TI

34、Fcentre D5 IC1 TEA5760UK C8 47pF C7 27pF C6 100pF L1 120nH C10 103 C13 104 C16 103 R15 10K R18 100K C11 103 L7 39nH SW1 BUS_ENABLE R19 10R C17 103 C15 103 SCL SDA INTX C12 104 R22 330 C18 47uF +5V3.0V 3.0V MPX C5 224 C4 224 Q2 9014 Q3 9014 R4 4.7K R5 4.7K R3 1M R1 47 R13 1K R14 1K C1 22uF C2 224 C3

35、224 R2 1M +5V LOUT ROUT DZ1 3.6V R6 4.7K C19 47uF/6.3V ROUT LOUT SGND +5V SCL SDA SGND 1 2 3 4 5 6 7 8 CN1 8P L5 600R L4 600R RFIN R8 68k CLOCK X1 32.768K R12 1M C20 12pF C21 39pF C14 10pF C9 104 R11 10M R16 10K CLOCK 3.0V L8 10uH Q1 8050 1A 1 GND 2 2A 3 2Y 4 VCC 5 1Y 6 IC274HC2G04 C22 22uF C23 100p

36、F C24 22uF C25 223 CIRCUIT DIAGRAM - TUNER BOARD 7 - 17 - 1 LAYOUT DIAGRAM - TUNER BOARD 7 - 27 - 2 8 - 18 - 1 CIRCUIT DIAGRAM - VFD BOARD SW1 1 SW2 2 SW3 3 SW4 4 DOUT 5 DIN 6 IC 7 CLK 8 STB 9 KEY1 10 KEY2 11 KEY3 12 KEY4 13 Vdd 14 S1/KS1 15 S2/KS2 16 S3/KS3 17 S4/KS4 18 S5/KS5 19 S6/KS6 20 S7/KS7 2

37、1 S8/KS8 22 S9/KS9 23 S10/KS10 24 S11/KS11 25 S12/KS12 26 S13 27 S14 28 S15 29 S16 30 S17/G12 31 S18/G11 32 Vdd 33 VEE 34 S19/G10 35 S20/G9 36 G8 37 G7 38 G6 39 G5 40 G4 41 G3 42 G2 43 G1 44 Vdd 45 LED5 46 LED4(BBE) 47 LED3(POWER) 48 LED2(FANCT) 49 LED1(7507RST) 50 Vss 51 OSC 52 IC601 uPD16311 R602

38、47K R605 33K R60633K R60733K R60833K K4 K3 K2 K1 D6024148 D6014148 STB1 CLK DATA S1 S2 S3 S4 S5 S6 S7 S8 S9 S1 S2 S3 S4 S5 S6 S7 KS2 -24V +5VS S1 S2 C602 104P R603 2.2/0.5 C604 104P C603 104P SW601 TACT(STBY) VF1 1 VF1 2 S1 3 S2 4 S3 5 S4 6 S5 7 S6 8 S7 9 S8 10 G1 11 G2 12 G3 13 G4 14 G5 15 G6 16 NC

39、 17 NC 18 NC 19 NC 20 G7 21 G8 22 G9 23 G10 24 G11 25 G12 26 S9 27 S10 28 S11 29 S12 30 S13 31 S14 32 S15 33 S16 34 VF2 35 VF2 36 VFD701 S10 S11 S12 S13 S14 S15 S16 G12 G11 G10 G1 G2 G3 G4 G5 G6 G7 G8 G9 G2 G3 G4 G5 G6 G7 G8 G9 S12 S11 G11 G10 S8 G1 S10 S9 G12 1 2 3 4 5 CN602 2.0/6P STB1 DATA CLK V-

40、GND +5VS 1 2 3 CN601 2.0/3P -28V VF2-1 VF1-1 D6034148 S3KS3 R604 2.2/0.5 C605 104P KS3 C601 47uF C607 334P C608 334P C609 334P C610 334P R601 4K7 R609 10K R610 10K K1 K2 K3 K4 KS2 +5VS SW608 TACT(CH-) SW606 TACT(CH+) SW604 TACT(PRE) SW602 TACT(NEXT) SW607 TACT(PLAY/PRESET) SW605 TACT(STOP/BAND) SW60

41、3 TACT(OPEN/CLOSE) KS2 K1 K2 K3 K4 KS3 S13 S14 S15 S16 R613 1K LED601 USB2 All parts comply with suppliey environment note： protect material licf regulate by green envionment management tolerance RES10 CAP20， special parts nated beside parts 8 - 28 - 2 LAYOUT DIAGRAM - VFD BOARD A5V X1 4.19MHz C64 30P C65 30P X2 32.768KHz C66 15P C67 15P C81 47uF/16V C82 104P R87 22K D6 4148 C79 10uF/16V SCL SDA MUTE STANDBY TUN-ON D3 IN60 A0 1 A1 2 A2 3 GND 4 SDA 5 SCL 6 TEST 7 Vdd 8 IC4 24C01 C71 104P 1